摘要
用搅拌摩擦加工法制备碳纳米管增强铝基复合材料,并对其组织及硬度进行了分析。结果表明:搅拌摩擦中心区晶粒尺寸与轴肩变形区相似,晶粒比较细小;搅拌摩擦区边界的晶粒组织发生了明显的塑性变形,晶粒被扭曲拉长。碳纳米管在搅拌摩擦中心区均匀分散,和基体结合良好。碳纳米管对基材有明显的强化作用,搅拌摩擦中心区硬度在55 HV左右,是纯铝的2倍。
Carbon nano-tubes reinforced aluminum matrix composite was prepared by friction stir processing.The microstructure and properties of the composite were analyzed.The results show that,in the shoulder deformation zone,the fine grain is similarto that of the centerof friction stirzone.On the edge of friction stir zone,the material has obvious plastic deformation and the grains are distorted and elongated.The carbon nano-tubes uniformly distribute in the centre of friction stir zone,and have good combination with aluminum matrix.The carbon nano-tubes obviously enhance the strength of matrix.The hardness of the centerof friction stirzone is 55 HV,which is 2 times as high as Al matrix.
出处
《热加工工艺》
CSCD
北大核心
2010年第20期76-79,共4页
Hot Working Technology
基金
国家自然科学基金资助项目(50674056)
关键词
搅拌摩擦加工
碳纳米管
纯铝基复合材料
显微组织
硬度
friction stirprocessing
carbon nano-tubes
aluminum matrix composite
microstructure
hardness
